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Fusing Color Electrophotographic Printing

IP.com Disclosure Number: IPCOM000107998D
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 37K

Publishing Venue

IBM

Related People

Aviram, A: AUTHOR [+2]

Abstract

A common step in electrophotographic (EP) printing is the fusing step that basically imbeds the toner powder that decorates the surface and produces a permanent image. In the case of color EP printing an overlay of several layers of toner (cyan, magenta, yellow and black) have to be fused simultaneously or sequentially into the paper. In any event it is important that the heated toner does not adhere to the surface of the fuser roller.

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Fusing Color Electrophotographic Printing

       A common step in electrophotographic (EP) printing is the
fusing step that basically imbeds the toner powder that decorates the
surface and produces a permanent image.  In the case of color EP
printing an overlay  of several layers of toner (cyan, magenta,
yellow and black) have to be fused simultaneously or sequentially
into the paper.  In any event it is important that the heated toner
does not adhere to the surface of the fuser roller.

      A set of commercial toners for EP color printing is based on
polyester resins and is used by Canon color copiers and Colorocs
Savin color copiers.  These toners have been used successfully to
print full color images by a variety of methods.  However, the fusing
stage was not straightforward and  required additional invention.
The steps that were taken to fuse these toners are outlined below.

      The hot toners adhere to many so-called inert surfaces that
traditionally have been used for fusing.  Surfaces such as silicon,
rubber, TEFLON*, KAPTON* and others perform poorly.  Our experimental
results show that MYLAR*, e.g., polyester, is unique in this respect.
For instance, when one partitions  toner powder between two hot
surfaces, one TEFLON and one MYLAR, by application of heat and
pressure, the fused image will adhere to the TEFLON surface and not
to the MYLAR surface.  The temperature required for good fusing is
180-200oC.  The image releases from MYLAR w...